Vibration producing means



-Oct. 31, 1950 E. F. PETERSON 2,528,319

VIBRATION PRODUCING MEANS Filed Oct. 3, 1945 3 ShQGiS-SIIGE-t 1 F 5 /0 F1 i I i l A I 7 I W flea-4' /a. din

, INVENTOR. tTEPEnRso/v zwiiwam d; 1950 E. F. PETERSON I 2,523,319

VIBRATION PRODUCING MEANS Filed Oct. 3, 1945 3 Sheets-Sheet 2 I N V EN TOR. E F PETERSON E. F. PETERSON 2,528,319

VIBRATION PRODUCING MEANS Oct. 31, 1950 Filed Oct. 5, 1945 3 Sheets-Sheet 3 Patented Oct. 31, 1950 UNITED STATES PATENT OFFICE 2,528,319 VIBRATION PRODUCING MEANS Edwin F. Peterson, Kewanee, 111.

Application October 3, 1945, Serial No. 620,119 1 Claim. (01. 74 -87) match plates, core boxes, and other types of patterns to' facilitate their withdrawal from the sand molds or, in the case of core boxes, the withdrawing of the box from around the core sand.

Among the objects of this invention are to provide a molder with simple, easily operated means whereby he may loosen the sand mold from the pattern, whether it be a match plate or any other kind of molding apparatus which needs to be shaken to be separated from sand; to provide an apparatus for the purpose indicated which is inexpensive to manufacture and easy to operate; to provide an apparatus for the purpose indicated which is easy to attach to the structure to which it is to be attached and is just. as readily detached therefrom; and such further objects, advantages, and capabilities as will hereafter appear and as are inherent in the construction disclosed herein. My invention further resides in the combination, construction,

and arrangement of parts illustrated in the accompanying drawings and, while I have shown therein what is now regarded as the preferred embodiment of this invention, together with certain modifications thereof, I desire the same to be understood as illustrative only and not to be tached to a match plate, shown fragmentarily;

Fig. 2' represents a transverse section substantiallyalong the broken plane indicated by the line 22, Fig. 3; s

Fig. 3 represents a plan view of this structure with the cap plate removed;

Fig. 4 represents a transverse sectional view substantially along the plane indicated by the line 4-4, Fig. 3;

Figs. 5 and 6 represent fragmentary elevations of a vibrator having a modified form of attachment lug;

Figs. 7 and 8 represent, fragmentarily, in plan and transverse section, respectively, a hollow .pattern mounted on a match plate, with a vibrator according to my invention mounted on the match plate, within the pattern, the match plate forming a part of the vibrator; I

Figs. 9 and 10 represent, respectively, in pla and edge view, a modified form of vibrator in which the plate constitutes a part of the vibrator;

Fig. 11 represents, in plan view, a vibrator inserted in a match plate;

Fig. 12 represents a section taken substantially along the plane indicated by the line [2-12, Fig. 11;

Fig. 13 is a plan view of 2 modified form of my new vibrator with thecap plate removed and the attaching bolt therefor in section; and

Fig. 14 represents a transverse section taken substantially along the plane indicated by the line l4 -l4, Fig. 13.

Reference will now be made in greater detail to the annexed drawings for amoredetailed description of this invention. The vibrator of this invention is shown in Fig. l as attached to a match plate I by means of a bolt 2 passing through a lug 3, projecting from one side of the body 5 of the vibrator. Projecting in a direction opposite from the lug 3 is a lug 5 which has a screw-threaded opening 6 for the attachment of an air hose or other suitable pipe; A smaller opening 1 extends inwardly as a continuation of the opening 6 and opens into the hollow interior of the body 4. A screen 6a is located between-the openings 6 and l. Fitted within the hollow of this-body is a wear-resistant ring 8 which serves as a track for the ball 9 to roll upon. Obviously, the rollable body may have a non-spherical form, such, for example, as a cylinder.

A cap ID has an inwardly projecting part II which fits closely inside of the ring 8. As shown at [2 and !3, the body 4 and cap Ill are hollowed out to form an opening in the shape of a torus which serves as a raceway for the ball 8 as it rolls around inside of the. body 4 on the ring 8. As shown at hi, there is a hole which cooperates with the hole! and extends into the inte rior of the ring 8. As is clear from Figs. 2 and 4, this hole i4 is offset with relation to the midplane of the raceway so that the ball 9 does'not strike the same when rolling around, which would tend to close up the opening.

A bolt l5 passes through the cap plate it] and, at its lower end, screws into the body 4 to hold the two parts together. This bolt is provided with a longitudinal opening l6 and a transverse intersecting opening I! which, together, serve as avent for the air enteringthe opening 6 and causing the rolling of the ball 9 around the raceway.

i It has been found in practical trials that, with the opening it going all the way through the bolt, there is nodan'ger of sand collecting in the raceway and stopping the ball but the sand often blows both ways out of the hole It and some of it may be blown into the face of the molder. However, when the hole l6 opens down only, there is no chance for the sand to be blown into the molders face. It isalso found that, if there is an opening from the raceway upwardly, there is a tendency for the sand to drop into the interior of the body and so clog up the raceway that the ball will not roll freely.

It is preferable to use an aluminum alloy for the body of the vibrator as a light weight metal does not absorb the vibration to such an extent as would a heavy metal body, such as cast iron. The inlet 1 is shown as bein devoid of any valve for controlling the rate of admission of air to the body chamber. a valve could be provided for regulating the flow of air, if considered desirable. In the structures as illustrated in Figs. 9, 11, and 13, there is shown a means 1 3 for regulating the rate of flow of air into the vibrator. This, or its equivalent, may be used with any of the constructions illustrated herein.

- In Figs. 5 and 6 there is shown a modification of this vibrator which is adapted to be attached in either of two positions at right angles to each other. In this case, the lug 3a is recessed, as shown at [9, to fit against the face or the match plate or other structure. It is provided with two holes 29 arranged at a right angle to each other so that the vibrator can be attached to a match plate with its mid-plane parallel to the plane of the plate or at anight angle thereto. Hence, if the two plane are parallel, then the vibration will be entirely in the direction of the plane of the plate but, if the plane of the vibrator is at a right angle to'the plane of the plate, then the vibration will be partly at a right angle to the plane of the plate, which is sometimes desirable.

In the structure of Figs. 7 and 8, the match plate is shown as provided with an inlet 1 and an outlet 2! for the actuating air, which enters the raceway tangentially and escapes therefrom through the hole in the bolt l5 and the outlet 2i in the match plate. In these figures, the pattern is represented by the parts 22 upon the two sides of the plate. The match plate is provided with a ring-like depression I2 constituting a part of the raceway, a similar depression l3 bein formed in the detachable part 911 of the vibrator. The air vents longitudinally through the bolt i5 and into the cavity 23 surrounding the bolt.

The structures of Figs. 9 to 12 are similar to the structure of Figs. 7 and 8 in that the match plate, itself, forms a part of the vibrator. However, in

the structure of Figs. 9 and 10, the inlet is not .through'the plate but through the detachable part or cap Illb, corresponding to part 59a. In this structure, the bolt i5 is similar to the bolt [5 in the structure of Fig. 2, the hole in the threaded end of the bolt being plugged after the hole I6 is drilled. In this structure, as in that of Figs. 7 and 8, the match plate has a circular groove which serves as a part of the raceway.

It is of course obvious that such In the structure of Figs. 11 and 12, a hole is formed in the extension of the match plate and the ring 8 is inserted therein, caps Inc and ltd being inserted from opposite sides, as shown clearly in Fig. 12. A ball 9 is housed in the raceway between these caps and they are held together by the bolt [5.

In the structure shown in Figs. 13 and 14, the cap Hie is provided with a circular boss 24 having a pair of grooves 25 leading therethrough from the cavity 26 surrounding the bolt l5a. These grooves provide venting means for the air and are much more easily formed than the drill holes in the bolt. These grooves 25 are covered by the name plate 21 held in place by the head of the bolt Various other modifications of this construction may be made within the scope of the appended claim without departin from this invention as defined by such claim.

Having now described my invention, I claim:

A vibrator for molding apparatus comprising a body member and a removable cover therefor, said body member having an approximately cylindrical opening therein, a metal lining for the cylindrical wall of said opening intended to serve as a track for a rollable body, a heavy metal ball within said opening designed to roll on said track, means for attaching saidbody to a molding apparatus, means for attachin to said body a conductor of a gaseous fiuid, the last mentioned means having an opening therethrough which opens into the body opening in a direction approximately tangential to the internal surface of said body lining, and longitudinally apertured means connecting the body and its cover, the aperture in said last mentioned means extending less than entirely therethrough, said longitudinally apertured means having a transverse opening connectin the longitudinal opening and the body opening and serving as a vent for the gaseous fluid, said gaseous fluid serving as a driving agent to cause said ball to roll along said track. EDNIN F. PETERSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 776,036 Swift Nov. 29, 1904 827,127. W'aite July 31, 1906 1,082,285 Peterson Dec. 23. 1913 1,397,058 Schaumleffel Nov. 15, 1921 1,459,848 Mitchell June 26, 1923 1,667,097 Beardsley et a1 Apr. 24, 1928 1,719,123 Mitchell July 2, 1929 1,796,394 Pickop Mar. 17, 1931 2,291,291 Alexander July 28, 1942 2,480,603 Peterson Aug. 30, 1949 

